Added ThreadSafe ExcelAsyncUtil.Observe sample function.

Author: Sergey-Vlasov

RtdClocks/RtdClock-IExcelObservable/RtdClock.cs

@@ -11,5 +11,13 @@ public static object dnaRtdClock_IExcelObservable(string param)
             object paramInfo = param; // could be one parameter passed in directly, or an object array of all the parameters: new object[] {param1, param2}
             return ExcelAsyncUtil.Observe(functionName, paramInfo, () => new ExcelObservableClock());
         }
+
+        [ExcelFunction(Description = "Provides a thread safe ticking clock", IsThreadSafe = true)]
+        public static object dnaRtdClock_IExcelObservableThreadSafe(string param)
+        {
+            string functionName = "dnaRtdClock_IExcelObservableThreadSafe";
+            object paramInfo = param; // could be one parameter passed in directly, or an object array of all the parameters: new object[] {param1, param2}
+            return ExcelAsyncUtil.Observe(functionName, paramInfo, () => new ExcelObservableClock());
+        }
     }
 }